Muffler for engines.



No. 659,456. Patented out. 9, |900.

J. M. SMITH.

MUFFLER FOB ENGINES.

' (Applicacioh med Feb. 2, 19oo,\ (No Model.)

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@QM @209% BW ATTORNEY ||||||||||||||I|||||||Ii UNITED STATES PATENT Ormes JAMESv M. SMITH, OF' NEWARK, NEW JERSEY, ASSIGNOR, `BY DIRECT AND MESNE ASSIGNMENTS, TO THE OXFORD MANUFACTURING COMPANY, OF

OXFORD, PENNSYLVANIA.

MUFFLER Fos ENeiNEs,

SPECIFICATION forming part of Letters Patent No. 659,456, dated October 9, 1900 Y Application filed February 2, 1900. Serial No. 3,667. (No model-l To (tZZu/hom it may concern: Beit known that I, JAMES M. SMITH, a citizen of the United States, residing at Newark,

in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in M uiiiers for Engines; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which 1o it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My present invention has reference to a I5 novel device to be employed in connection with explosive-gas or other engines for the deafening or inuiing of the sound made by the exhaust from the engine-cylinder.

My invention therefore has for its primary zo object to provide a novel and simple construction of muiiling device for engines which is especially adapted for use in connection with e explosive-gas engines, and is more especially for the purpose of allowing the exploded gas as it escapes or exhausts from the cylinder of the engine to expand in a relief-chamber, and, Iinally, after its force has thus been almost entirely expanded permitting it to noiselessly pass from an eduction-pipe into the air. 3o My invention consists in the novel construction of muflier hereinafter described and inthe several novel arrangements and combinations of the parts thereof, allqof Whichwill be fully set forth in the accompanying specifica- 3 5 tion and t-hen finally embodied in the clauses of the claim thereto appended.

The invention is clearly illustrated in the accompanying drawings, in which- Figure l represents the muffler embodying 4o the principles of this invention, the reliefchamber being represented in vertical section and an eduction pipe or duct and certain parts connected therewith being illustrated partly in elevation and partly in vertical section,

45 said view also showing the application of the muffler to the exhaust duct or ducts of an en, gine-cylinder. Fig. 2 is a part elevation and part section of a portion of the eduction-pipe, represented on an enlarged scale; and Fig. 3

application, Serial No. 741,087.

is a horizontal cross-section of the said educ- 5o tion-pipe.

Similar letters of reference are employed in all of the said above-described views to indicate corresponding parts. y

In said drawings, a indicates any suitable construction of cylinder ofpan explosive-gas engine, the construction herein shown being of the type of cylinder employed in the gasengine for which I have made application for `Letters Patent, filed December 21,-lo99, Serial 6o No. 741,087. `rThe said cylinder is provided with an exhaust-chamber ct, in which is secured the exhaust-pipe a2, having in said construction a T connection or fitting a3, and a second exhaust-pipe b, which is connected with the upper portion of the cylinder u in the manner illustrated in the drawings of said Connected with the said T- fitting a3 is a pipe c, an elbow c', and a pipe c2, from the screw-end c3 7o of which is suspended the mufiiing device embodying the principles of this invention.

l Said mufding device comprises a relief-chamber d and an eduction pipe ory duct e, which is encircled by the coils of a relief-spring e', substantially as and for the purposes to be 'hereinafter more fully described. The said relief-chamber d consists, essentially, of

a cylindrical or other suitably-shaped main` body portion d, provided'- at the top with 8o screw-threads d2 and at the bottom with screwthreads d3. Screwed down upon the screwthreads d2, so to close the upper portion of said main portion d', is a cover d4, provided with a screw-threaded opening d5, in which the screw end e3 of the pipe c2 is secured for thesuspension therefrom of the said reliefchamber d. Screwed upon the lower arrangement of screw-threads d3 of the main body portion d' is a cap d6, which may be provided 9o with a screw-threaded opening d7,in which I have secured a petcock d8 for the well-known purpose of drawing 0E any water due to condensation or for the purpose of withdrawing the exhausted gas or fluid if found necessary to do so. In one side of the body portion d' is a screw-threaded opening d9,in which is secured the end of a pipe f, which pipe is provided with an elbovvf, Whichrcarries the exhaust pipe or duct e, hereinabove mentioned. 0f course it will be evident that the casing forming the' said relief-chamber may be of any desirable configuration and that the main body portion d' and the caps or covers (Z4 and d may all be made in one integral piece.

The eduction pipe orn duct e is usually an ordinary piece of pipe or -tubing, having its lower end secnredifin the elbow f', its upper end having a screw-thread e2, on which is screwed a cap or cover e3 for closing the end of the said pipe'e. Encircling the said pipe e, between the upper edge]e2 of the elbowf and the annular edge of the flange e4 of said cap or cover e3, are the helical coils of a suitable spring c', as clearly illustrated. The cylindrical walls of the pipe e are provided with any desirable number of holes or perforations e5, which radiate toward or from the longitudinal central axis of said pipe e, the center of said holes orl perforations being preferablyvplaced in such a manner that they are on an imaginary line, forming a helix around the outercylindrical surface of the said pipe e. In this manner when the several coils of the spring e' have been com'- pressed, so as to lie in close contact, as illustrated, by the screwing down of the cap or cover e3, the center of'the said holes orV perfoi-ations e5 will be on the central helical axis of the coils of the said spring. It Will thus be seen that the several coils of the spring fully close up the several openings or holes e5 in the pipe e, the spring-coils having such resiliency to produce a retarding effect upon the escaping gas, steam, or the like during the escape of the'sanie, andfthe passage of such previously-coinpressed gas or steam Will be noiselessly eiected, and more espe-4 cially so in view of the employment of relief-chamber, as d, in which the gas or steam is permitted' to expand and 'lose much of its expansive power.

From the above description it Will be seen that I have devised a sim ply-constructedy and an effective mufiier; which is especially adapted for use with explosive-gas engines, but which may also be employed'in connection with steam orotherengines andin fact, in connection with mechanism of the various kinds from which comp'essed gas or steam is exhausted to deaden or entirely overcome the noise made.

I am aware that some changes may be made in the various arrangements and combinations ot' the several parts, as Well as in the details of the construction thereof, without departing from the scope ol this invention. lIence l-do not limit my invention to the exact arrangements and combinations ofthe parts as herein described, and illustrated in the accompanying drawings, nor do I confine myself to the exact details of the construction of such parts.

Having thus described myinvention, what I claim isl. In a muiiier for engines, an exhaust or eduction pipe or duct, having a closed top and an inlet for receiving the exhausted medium, and providedv with radially-extending and helically-disposed holes or perforati'ons, and apspring encircling the outer surface of said pipe or duct, the central helical pitchline of the coils` of said spring corresponding to an imaginary helical line around said pipe or duct on whichsaid holes or perforations have their centers, substantiallv as and for the purposes set forth.

2. In a muier'for engines, the combination, ofa casing forming a relief-chamber, having a means of ingress and egress for the medium to be exhausted, of an exhaust-pipe connected therewith, havinga closed top, and provided with radially-extending and helically-disposed holes or perfor-ations, and a spring encircling the outer surface oflsaid pipe, the central helical pitch-line ofthe coils of said spring correspignding toan imaginary helical line around said pipe on which said ,holes or perforations have their centers, substantially as and for the purposes set forth'.

3. Theherein described muffler for engines, consisting,"essentially, of a casing d, a top and bottom cover therefor, said top cover having an opening, and a means of ingress therein for the-admission of the medium to be exhausted, said casing having an opening in one side thereof, and an eductione pipe e connected with said opening inthe side of said casing, said pipe e being provided With helieally-disposed openings or perforations e5, and a spring eencirclingsaid pipe and arranged over said holes or perforations, substantially as and for the purposes set forth,

In testimony that I claim the invention set forth above I have hereunto set my hand this 30th day of January, 1900.

JAMES M. sMiTn.

IOO 

